QuestionsWhy is there something rather than nothing?Because there is a law like gravity, the universe can create itself from nothing
Why is there something rather than nothing?Physics answers

Because there is a law like gravity, the universe can create itself from nothing

Spontaneous creation (Hawking)

Stephen Hawking 1942 · 2018A theoretical physicist who sees the origin of the universe in the laws of physics rather than in a creator.
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What it claims

Spontaneous creation is the reason there is something rather than nothing, and it is not necessary to invoke God.

Why

Gravity's negative energy balances that of matter: a whole universe can arise from nothing, with no God needed to start it.

The same idea through history
In short

"Because there is a law like gravity, the universe can create itself from nothing" is an argument by Stephen Hawking (Hawking and Mlodinow, The Grand Design, 2010, 2010) on the question "Why is there something rather than nothing?" (answer: physics answers). Its claim: Spontaneous creation is the reason there is something rather than nothing, and it is not necessary to invoke God. According to AskPhilosophy's logic check (Z3 solver), the argument is valid only if one grants a premise the author leaves unstated (P3). AskPhilosophy presents 3 objections, 1 of them with a documented reply, and the original text behind each premise, checked word for word.

Hawking and Mlodinow, The Grand Design, 2010
Valid with an implicit premise

In September 2010 the physicist Stephen Hawking published The Grand Design with Leonard Mlodinow. The Times published extracts before the book's release, and the press picked up one sentence: because of a law such as gravity, the universe can and will create itself from nothing. This "spontaneous creation" is, they write, the reason there is something rather than nothing, and it is not necessary to invoke God to set the universe going. Their physical reason comes down to one idea: the positive energy of matter can be exactly balanced by the negative energy of gravity, so that the total energy of a whole universe can be zero. Creating a universe then "costs" nothing.

P1There is a law like gravity. Because gravity attracts, its energy is negative: on the scale of the universe it can balance the positive energy of matter, and then nothing forbids the creation of whole universes.
P2Because of such a law, the universe can and will create itself from nothing: the creation is spontaneous.
P3 · implicit premiseIf the laws of physics suffice to bring the universe into being, no outside agent is needed to set it going.
Therefore spontaneous creation is the reason there is something rather than nothing, and it is not necessary to invoke God.

click a premise to reject it

If you accept every premise, logic forces you to accept the conclusion. So the debate is about the premises.
Checked by a logic solver: the premises cannot all be true while the conclusion is false.
Without the implicit premise: Without P3, the computer finds a case where laws suffice to bring the universe into being but where those laws are themselves willed by a creator.
Valid with P3. Without P3, one could think that laws suffice to bring the universe into being and that God nonetheless chose those laws. This is precisely what critics dispute: the law of gravity is itself "something" to be explained.
Analogy. A campfire that catches as soon as a spark comes near: Hawking says that in the universe, the "law" is enough for the fire to start on its own. Critics ask where the wood, the air and the law that makes it burn come from. The image is ours.

Objections

3

Each objection is a conversation: click to see who replies and where the debate stands.

D
David Albert 2012 · attacks the conclusion

Albert, a philosopher of physics, replies to a neighbouring book (Krauss's): where do the laws of physics themselves come from? And the "nothing" of quantum theories is not nothing: it is a particular arrangement of fields, whereas true nothing would be the absence of the fields themselves. A law like gravity is not nothing either.

a defender replies
Lawrence Krauss defender of the argument · 2012
In his book, Krauss had already answered this kind of objection: for him, the scientists' "nothing" is the vacuum, and that some philosophers and theologians keep redefining it so that it is never the one science describes.
Where the debate stands (our summary)The disagreement is about the meaning of the word "nothing" and the status of laws: are they a starting point needing no explanation, or the very thing to be explained? No consensus (our summary).
Gottfried Wilhelm Leibniz 1714 · attacks premise 2

The sufficient reason cannot be found in the sequence of contingent things. Even if a law such as gravity brings the universe into being, one must say why this law exists rather than another or none. This is not a reply by Leibniz to Hawking, which never took place, but the modern form of his principle of reason.

no reply
No reply possible: objection raised in 1714, after the author's death (2018).
The debate goes on (our summary) Leibniz died in 1716. A defender of Hawking would answer that the question "why these laws?" falls outside physics and may have no answer; a defender of Leibniz, that it is precisely the question asked (our summary).
Where the debate stands (our summary)Open point: physics can describe how a universe arises from a law, but it does not say why there are laws. Both camps consider the question open (our summary).
J
John Lennox 2011 · attacks premise 3

In God and Stephen Hawking, the mathematician and philosopher John Lennox replies to Hawking that his claim presupposes the law of gravity and the physical theory describing it. For him, a law of nature depends on the nature it describes: it cannot bring it into existence. Laws describe what happens; they create nothing. Choosing between "God" and "the laws" is therefore a false choice, like choosing between the engineer and the laws of physics to explain an engine.

no reply
We have not yet found a direct reply by Hawking in the texts.
The debate goes on (our summary) We found no reply by Hawking to Lennox, who published after the book. A supporter of Hawking would say that laws may be brute facts needing no further explanation (our summary).
Where the debate stands (our summary)The core disagreement: are the laws of nature brute facts, or do they have a source? Physics does not settle it. No agreement (our summary).